(a) . Main lines of latitudes a Arctic circle (66'/,°N)
(b) Tropic of cancer PT/2°N)
(c) Equator (0°)
(d) Tropic of capricorn (23'12°S)
(e) Antarctic circle (66'/,'S)
(a) Latitude of Addis Ababa = 10°N
(b) Latitude of Maseru = 30°S
(c) Latitudinal difference = 10° + 30° = 40°
(d) Since 1° = 111km or 111.1km
(e) 40° = 4440km or 4444km
(b) Solution
i. Revolution of the earth is the movement of the earth round the sun on its orbit
ii. Effects of revolution on the lengths of day and night in the northern Hemisphere
(a) The length of day and night varies depending on the position of the earth in relation to the sun.
(b) The periods of day light increase during summer as we move towards the north pole.
(c) At the Arctic circle (66'/2°N) there is a complete 24 hours period of continuous day light on June 21.
(d) The region from Arctic circle to the north pole at this time is called 'the land of the midnight sun"
(e) This period is when the sun is overhead at the Tropic of Cancer,
(f) In winter period around December 22, the hours of darkness increase towards North Pole.
(g) The sun never rises at the Arctic circle
(h) There is complete darkness for the whole day on December 22
(I) During this period the sun is directly overhead at the Tropic of Capricorn.
(j) There is equal day and night during equinox
(k) The sun is directly overhead at the equator on March 21 and September 23